The recent images were taken by NASA's Mars Global Surveyor space probe. The discovery is important because it might help prove that the Red Planet has an environment that is favorable for living beings. Just trying to find remote signs of liquid water on Mars has been a goal among scientists around the world for a number of years.

The cameras on the Mars Global Surveyor were the first to take images that initially suggested water once flowed on Mars. Scientists then went and searched valleys in search for conclusive evidence of water flow. Just like most reports regarding Mars, there is some debate as to whether or not it really was liquid water -- some scientists claim that liquid carbon dioxide may have cut the gullies.

The findings by researchers were published today in the journal Science – NASA held a news conference to announce the results of the study. The idea that water recently flowed on Mars is another piece of the puzzle that NASA is trying to put together about the still very foreign Red Planet.

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Maybe but if they slowly melted the ice capes it would then turn to water and water turn into vapour which will help kill most of the CO2 and help revive the planet. while the remander will flood across the planet.

Mars, unlike earth, does not have a magnetic field. This would make any attempt to pressurise the atmosphere useless as it would be stripped away from the planet by the solar wind. Mars is simply too old and too small!

Our only hope to colonize another earth like planet is to jump across to a cooler Venus in about 500 million years.

quote: Mars, unlike earth, does not have a magnetic field. This would make any attempt to pressurise the atmosphere useless as it would be stripped away from the planet by the solar wind. Mars is simply too old and too small!

Ding ding ding, we have a winner. No magnetic field = any attempt at terra forming would be moot. The Atmosphere would just get stripped off into space again. Not to mention Solar radiation is quite lethal when no magnetic field is present to block it. The same fate would befall earth should it lose its field.

Mars had a magnetic field at one point, along with liquid water and an atmosphere. But once its Core cooled and turned solid, field go bye bye. Earth is massive enough that it will be eons before we lose our core and we will have long since destroyed the planet by other means.

> "Ding ding ding, we have a winner. No magnetic field = any attempt at terra forming would be moot. The Atmosphere would just get stripped off into space again..."

Err, thats a very slow process. The solar wind is estimated to complete the stripping of the Martian atmosphere in the next one hundred million years. A denser atmosphere would loss mass faster...but its still not a problem for human lifetimes.

The solar wind isn't a terrible problem for human colonization of Mars (or Luna, for that matter, where the flux is much higher).

Well actually, solar wind could be a very terrible problem on Mars. It has stripped much of the atmosphere and delivers lethal doses of radiation and plasma since the protective magnetosphere is no longer generated by Mars' core.

However, Mars seems to have 'plates' that are permanently magnetized, and provide a protective field over that area. These spots are relatively safe compared to the rest of unshielded Mars and show potential for further research and perhaps colonization.

The solar wind isn't the real problem, its solar flares that are dangerous. However, the radiation from them is easily blocked by lightweight materials. All colonists would need to do is stay inside during solar "bad weather", and they've negated nearly all the risk.

And, as you point out, there are areas of the Martian surface magnetized enough to provide some shielding effect.

You were correct in that Mars is not protected from the solar wind, but incorrect in the conclusion that this would make any attempt to terraform an atmosphere futile. Atmospheric loss is a very slow process that takes hundreds of millions of years.

Fill a car tire with air, and even the best sealed ones will go flat within a few decades. Yet we don't consider filling tires a "useless" endeavor...we simply add more air as needed. In the case of Mars, topping off would only be required every few million years. Not exactly a problem to be feared, assuming one can generate the atmosphere in the first place.

Oh sure, because the human race is still going to be around in 500 million years time. Mars,aside from our own moon, is the closest, and most viable option for our next step into our solar system. We should be focusing our efforts on what we can achieve, rather than what we cannot achieve. Unfortunately, everybody is an expert from the comfort of their computer chair......